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2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)最新文献

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A Direct Pre-Disortion Method Based on Gaussian LED Nonlinear Behavior Model for Visible Light Communication 基于高斯LED非线性行为模型的直接预畸变可见光通信方法
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597960
Rongzhao Wu, Xin Chen, Yarong Guo, Jiang Liu, Peng Liu
{"title":"A Direct Pre-Disortion Method Based on Gaussian LED Nonlinear Behavior Model for Visible Light Communication","authors":"Rongzhao Wu, Xin Chen, Yarong Guo, Jiang Liu, Peng Liu","doi":"10.23919/PIERS.2018.8597960","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597960","url":null,"abstract":"This paper proposes a Gaussian behavior model to describe the LED memoryless nonlinearity of voltage-to-optical power (V-P) conversion process. The production mechanism of LED memoryless nonlinearity is analyzed. A serials of experiments on voltage-current-optical power (V-I-P) characteristics of different bands' LEDs are conducted. It is shown that the LED memoryless nonlinearity mainly exist in the low bias-voltage area and high injection current area. What's more, such a LED V-P process's nonlinear behavior appears to be described by Gaussian function with a high fitting degree. Based on the Gaussian nonlinear behavior model and its inverse function, a direct pre-distortion method is proposed to mitigate the memoryless nonlinearity of visible light communication system.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114620952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SAR Observations and WRF Modeling of Marine Atmospheric Phenomena 海洋大气现象的SAR观测和WRF模拟
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597982
X. Li, W. Zheng, D. Shen
{"title":"SAR Observations and WRF Modeling of Marine Atmospheric Phenomena","authors":"X. Li, W. Zheng, D. Shen","doi":"10.23919/PIERS.2018.8597982","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597982","url":null,"abstract":"The interaction between ocean/atmosphere physical processes and the short Bragg and intermediate oceanic gravity waves will lead to a change in sea surface roughness, which is one of the key parameters that need to be measured from the space. Spaceborne synthetic aperture radar (SAR) can measure the ocean and ice surface roughness in the microwave band without being hampered by cloud cover and lack of Sun light during nighttime. Modern SAR's are high-spatial-resolution (10 m) and wide-swath (up to 450km) imaging radars that can “view” these sea surface roughness patterns associated with marine atmospheric boundary layer phenomena in great details. In this presentation, dynamical features associated with these phenomena (tropical cyclones, atmospheric vortex streets, atmospheric gravity waves, fronts, katabatic winds) will be presented. The state-of-the-art WRF model can now simulate the atmospheric conditions in a spatial resolution comparable to that of spaceborne SAR. We implemented the nested WRF numerical model with actual meteorological conditions as inputs to simulate the 3D structure and the temporal evolution of some of the marine atmospheric phenomena. The sea surface wind patterns simulated by the WRF model and observed by SAR are compared to cross validate of the model run results.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121657981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Algorithms for Flying Object Detection 飞行目标检测算法
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598196
J. Janousek, J. Novotny, P. Marcon, A. Sirucková, R. Kadlec
{"title":"Algorithms for Flying Object Detection","authors":"J. Janousek, J. Novotny, P. Marcon, A. Sirucková, R. Kadlec","doi":"10.23919/PIERS.2018.8598196","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8598196","url":null,"abstract":"The object detection and recognition are used for location, identification, and categorization of objects in the images and video. We use video record form flying object in our paper. Video record was transformed into individual images that were preprocessed. In the next step, algorithm for capturing a flying object was applied. Afterwards, algorithm for an object recognition was used. This algorithm is based on Oriented FAST (Features from Accelerated Segment Test) and rotated BRIEF (Binary Robust Independent Elementary Features) methods. The procedures were implemented on a small and affordable computer Raspberry PI 3 model B.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"8 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113960054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of the Resolution of a Multi-Position Radar for the Control of Small-Sized Space Debris Objects That Are Not Resolved by Angular Coordinates 非角坐标空间碎片多位置雷达控制分辨率估计
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598081
A. Baskakov, A. Komarov
{"title":"Estimation of the Resolution of a Multi-Position Radar for the Control of Small-Sized Space Debris Objects That Are Not Resolved by Angular Coordinates","authors":"A. Baskakov, A. Komarov","doi":"10.23919/PIERS.2018.8598081","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8598081","url":null,"abstract":"We propose a version of the resolution of space debris that are in the same equivalent receiving antenna beam, according to the delay time of reflected signals on the path from the transmitting antenna to the receiving antenna, which requires an increase in the width of the spectrum of the probing signal. Dependence of the resolution on the viewing angle is shown.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114767509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pollution Detection for Insulators of Power System Based on Image Processing 基于图像处理的电力系统绝缘子污染检测
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8598235
S. Yan, Qing Xu, M. Tong
{"title":"Pollution Detection for Insulators of Power System Based on Image Processing","authors":"S. Yan, Qing Xu, M. Tong","doi":"10.23919/PIERS.2018.8598235","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8598235","url":null,"abstract":"Under adverse weather conditions, such as heavy fog, drizzle, snow melt, pollution flashover is easily occurred which can seriously damage the reliability of the power supply. Solving the safe operation of transmission lines is a top priority and has important implications for solving the flashover problems. In this paper, we proposed an approach of pollution detection for insulators of power system based on image processing. It enables the transmission lines to change from planned maintenance into condition-based maintenance. It uses OTSU to obtain segmented images and uses Fisher criterion to determine insulator contamination. The experimental results show that this method is effective.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124341309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-Temporal Land Deformation Monitoring in V Shape Area Using Quasi-Persistent Scatterer (Q-PS) Interferometry Technique 拟持续散射体(Q-PS)干涉测量技术在V形区域的多时相陆地变形监测
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597664
P. Razi, J. Sumantyo, D. Perissin, Fajar Febriany, Y. Izumi
{"title":"Multi-Temporal Land Deformation Monitoring in V Shape Area Using Quasi-Persistent Scatterer (Q-PS) Interferometry Technique","authors":"P. Razi, J. Sumantyo, D. Perissin, Fajar Febriany, Y. Izumi","doi":"10.23919/PIERS.2018.8597664","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597664","url":null,"abstract":"Kelok Sembilan area, West Sumatra, Indonesia located in ‘V’ contour shape is playing an important role to support the transportation connection in the center of Sumatra. However, in the rainy season, landslide event was high along this way, then monitoring and mapping a necessity to for minimizing its impact. Quasi-Persistent Scatterer Interferometry (Q-PSI) technique was applied for extracting information of land deformation on the area from time to time. Beside have high performance for detecting land deformation, Q-PSI technique was selected to improve the number of PS point. It's required beccause the method applied to vegetation area with short wavelength SAR (C-Band). This research was supported by 90 scenes of Sentinel-1A taken from October 2014 to November 2017 for ascending and descending orbit. Both satellite orbits detected two critical location of land deformation namely as zone A and Zone B located in steep slope that more than 500 mm movement in the line of sight (LOS).","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124452374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
A Refined VR Based Video Indirect Ophthalmoscope 一种改进的基于VR的视频间接检眼镜
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597630
K. Bharathan, S. Tejas, G. Tejas, T. E. Ashraya Nayaka
{"title":"A Refined VR Based Video Indirect Ophthalmoscope","authors":"K. Bharathan, S. Tejas, G. Tejas, T. E. Ashraya Nayaka","doi":"10.23919/PIERS.2018.8597630","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597630","url":null,"abstract":"Diabetes is a serious cause of concern in today's modern world. Diabetic retinopathy is a condition in the human eye which affects the retina and in long term causes blindness. The people suffering from diabetic retinopathy are increasing at an alarming rate. There are various methods and procedure for diagnosis of this medical condition. Currently, the patient has to undergo dilation of the eye 20 to 30 minutes before the observation and also after the observations are made, the dilation procedure is repeated before Retinal fundoscopy. The doctor has to diagnose innumerable number of patients on a single day. This methodology is tedious for elderly patients and also takes a lot of time for the doctor. We have proposed and developed an innovative design of a video indirect ophthalmoscope which performs the function of both observation and fundus imaging. The lens frame is worn on the patient and the doctor can observe the image of the retina on a LCD screen. The doctor can capture photos and have the entire particulars stored on the server. The observation can also be made on any monitor/phone/laptop over the intranet. A GUI is provided for the database entry. The results obtained are of good quality (2560 × 1920 pixels) and video resolution of 1080p at 30 frames.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124455886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Transmission Resonance Phenomena for a Narrow Rectangular Slot in Thick Conducting Screen 厚导电屏窄矩形槽的透射共振现象
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597710
Kyoung-Je Park, Young-Ki Cho
{"title":"Transmission Resonance Phenomena for a Narrow Rectangular Slot in Thick Conducting Screen","authors":"Kyoung-Je Park, Young-Ki Cho","doi":"10.23919/PIERS.2018.8597710","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597710","url":null,"abstract":"Two types of transmission resonance phenomena which are observed in a narrow rectangular slot structure in thick conducting screen is dealt with along with experimental verification. Some discussions are also given in connection with the transmission resonance phenomena occurring in the cylindrical hole structure in the real metal, which was once called the extraordinary optical transmission (EOT) phenomena.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124039418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Novel Chipless RFID Tag Based on Backscattering Principle 一种基于后向散射原理的无芯片RFID标签
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597886
G. Wan, Yong Kang Kuang, Qing Xu, M. Tong
{"title":"A Novel Chipless RFID Tag Based on Backscattering Principle","authors":"G. Wan, Yong Kang Kuang, Qing Xu, M. Tong","doi":"10.23919/PIERS.2018.8597886","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597886","url":null,"abstract":"The chipless radio frequency identification (RFID) technology represents a new direction of development for RFID technology, but there are still many deficiencies in this technology currently. The distinct problem is the lack of strong capability of carrying information and the large size of tag. In this paper, a new structure for the chipless RFID tag is proposed based on the backscattering principle of electromagnetic (EM) wave. It is a C-shaped defect ring nested structure which does not increase the size of tag while can expand the coding capacity. The new structure equivalently has a multi-signal processing capability and can independently send and receive signals with coded information. The performance of the new structure is verified by simulation and measurement.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124132728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Method of Adaptive Gaussian Decomposition Based Recognition and Extraction of Scattering Mechanisms 基于自适应高斯分解的散射机理识别与提取方法
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama) Pub Date : 2018-08-01 DOI: 10.23919/PIERS.2018.8597899
X. Y. He, P. Gao, Wei Gao, X. Mi, Y. Zhang
{"title":"The Method of Adaptive Gaussian Decomposition Based Recognition and Extraction of Scattering Mechanisms","authors":"X. Y. He, P. Gao, Wei Gao, X. Mi, Y. Zhang","doi":"10.23919/PIERS.2018.8597899","DOIUrl":"https://doi.org/10.23919/PIERS.2018.8597899","url":null,"abstract":"In the methods of Near-Field ISAR imaging based Near-Field Far-Field Transformation (NFFFT), all target scattering is assumed to occur at the location of the incident field excitation. It's obviously non-localized scattering phenomenon such as re-entrant cavity scattering and surface traveling waves cannot be effectively handled. The presented method could find out where the non-localized scattering phenomenon occurred and separate from the scattering signatures. Then we can emendate the non-localized scattering part and improve the NFFFT precision. We present a method for recognition and extraction of scattering mechanisms. Firstly, calculate the spectrogram of target's scattering echo by an adaptive time-frequency transformation method named Adaptive Gaussian Representation (AGR). Then separate the wide components and narrow components of the Gaussian functions from the echo. Making images by the two parts respectively, the local and non-local scattering mechanisms and where it happened can be recognized. Beside of the NFFFT using, the method we presented could also be used to recognize and extract scattering mechanisms in complex target, and can be used in stealth design, SAR/ISAR image processing, etc.","PeriodicalId":355217,"journal":{"name":"2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127794914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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